Mortar-mixing machine



lAwal 27,1926c 1,582,357

i O. C. TALBOT ET AL MORTAR MIXING MAGHI NE Filed Nov. 1'7, 1924 2 sheets-sheet i April 27 1926.

1,582,357 o. TAlfBoT ErAL MORTAR MIXING MACHINE Filed Novf 17, 1924 2 sheets-sheet 2 @ae/finir.'

Patented Apr. 27, 1926.l l v UNITED STATES PATENT OFFICE.

oLIvEn c. TALBOT Am) ANDREW FLOOD, or xANsAs CITY, Missoula.

Konami-lamme MACHINE.

Application med November 17, 1924. serial No.. 750,403.

To all whom t may concern.

' Be it known that we, OLIVER C. TAnBoT and ANDREW FLOOD, citizens of the United States, and residents of Kansas City, county of Jackson, State of Missouri, have invented a certam new and useful Improvementm i Mortar-Mixing Machines, of which the following is a complete specification. Thisinvention relates to a machine for mixing mortar, plaster, cement and the like, and more especially to al structure whereby a quick-setting ingredient or material may be quickly, thoroughly and economically mixed with'others andthe discharge of the mixture effected with rapidity and completeness, it being characteristic-of mortar, plaster and the like that if left in Ithe mixing chamber, there will be a tendency to effect a setting `of the next mix before the materials thereof have been transformed 1nto a sufficiently homogeneous mass. Because 'of this fact one of the important features of the invention is to provide agitators which in effect, scrape the walls of the mixing chamber and thereby insure` a thorough removal therefrom of all of the mix during the discharging or dumping operation.

Another important object is to produce a machine which quickly effects a thorough mixing'of the materials in the interest of large capacity and economy of operation costs.

With these general objects in view, the invention consists in certain novel and useful 'features `of construction and combinations'lof parts as hereinafter described and claimed;.and in order that it vmaybe fully understood, reference is to be had' to the accompanying drawings` in which:-

Figure l is a side elevation of a mixing machine embodying the invention. i

Figure 2 is a vertical section on the line II-II of Figure 1.` .v l Figure 3 is a fragmentary section Vonthe line III-III of Figure 1. Figure 4 is an enlarged vertical sectionthrou'gh the container of the machine.

Figure 5 is a sectiontaken on the line V-V of Figure 4, and also shows a fragment of the frame work of the superstructure of the machine.

In the said drawing, lis a wheeled truck and 2 a traction bar or tongue. This truck or any other similar support should in its" preferred form, be narrow enough to pass through an ordinarydoor opening and short operation.

enough to be conveniently carried on an ordinary freight elevator so that it canbe used on any floor of a building where it may be desirable to mix mortar or the like.

A skeleton superstructure for the truck comprises uprights 3 connected in pairs at' their upperends by cross beams 4, the respective side uprights being connected by longitudinal bars 5 and 5, the former beingat the upper ends of the uprights and the bar 5, 1n a lower plane. Bearings 6 are mounted on the cross beams 4 for a pair lof alined shafts 7 and 7a, and journaled on t said shafts is a tiltable-cylindrical container 8 having atop opening and a flaring hopper A9, through'which material is introduced into stands inthe path of the hopper, as shown by dotted lines in Figure 2.

Rotary agitators, of which shafts 'i' and 7a form parts, also comprise hubs 13 on said shafts, arms 14 extending radially from the hubs,'and-blades 15 lsecured to the outer v ends of said arms. Preferably there will be two arms and blades foreach agitator, each pair of blades respectively, beingof form` to. in effect, scrape one end wall and one half of the cylindrical body of the container inl order that the entire mass of plastic mixture, as hereinafter referred to, may be stirred and mixed, and eventually expelled from the container.l To accomplish the first of these -results thoroughly and expeditiously, the blades at one end are set angularly with respect to the longitudinal axis of the container, so that they shall impart circular and endwise movement tothe mass, the blades of one set moving the mass into the path of rotation of the blades of the other agitator, and to make this operation more eliicient', the blades of one agitator are opposite the spaces between the blades of the other agitator, 'that is to say, the blades of one agitator occupy different radial planes from those of the other. I To accomplish the other object, the agitators are mounted on separate spaced shafts operated in reversed directions, one forcing the mass into the path the following mechanism is provided: 16

is a suitable motor mounted on the truck and rovided with a driving cog pinion 17 mesh# mg with a gear wheel 18 journaled on a lone gitudinal shaft 19 suitably mounted on thetruck. The gear wheel 18 has a clutch member 20for engagement at times by a clutch member 21 keyed to rotate -with and slide upon shaft 19,'aconventional clutch-operating lever 22 being provided to slide clutch member 21 into and out of engagement with clutch member 20. A gear pinion 23 on shaft 19 meshes with a gear 24 on a counter shaft 25. Shaft 25 has a sprocket wheel 26 connected to a large sprocket wheel on shaft 7, by a chain 27, and a sprocket Wheel 28 on shaft 19 is connected to a large sprocket wheel 29 on shaft 7a by a chain 30. The

power-transmission mechanism described imparts simultaneous rotation in opposite directions to the agitators when the motor is in operation and the clutch members are in y engagement. When the clutch members are unclutched, the gear wheel 18 revolves upon shaft 19 without transmitting power ,to either of the agitators.

- Assuming the container is charged with the proper materials for a mixture of mortar, or the like, and that the motor is in operation, the attendant throws the clutch lever to engage clutch member 21 with the clutch member 2O of wheel 18. This engagement instantly imparts rotation to shaft 19 and reversed rotation through gear wheels 23 and 24 to shaft 25, power being trans- Initted through the respective sprockettransmission mechanisms to the shafts 7 and 7, sothat the agitators shall revolve at the same speed in opposite directions, and thus stir and mix the materials in the container, 1t being noted that by reason of the angular relation of the blades of one shaft 'with respect to the other, that the material is not only forced circularly within the container, but also from the ends toward the center of the container, it being also noted that the bulk of the material as forced cndwise by the blades of each set of agitators, enters the spaces between the blades of the other set so that all of the material is shunted back and forth lengthwise of the con- .tainer as well as moved circularly therein.

This treatment of the materials effects an exceedingly quick and thorough admixture and insures a correspondingly large output as compared with a machine in which agitators revolve inthe same direction. It will also be noted that as the blades collectively scrape, in effect, the entireinner surface of the c/Jntainenand as there is no shaft impediment except near the ends of the container, practically the entire mixture can be quickly evacuated, so that without loss of time attendant upon scraping the interior of the container by hand, the latter can be recharged with materials for producing a new batch of mortar or the like.

As a batch is completed, anattendant by means of handle 11, tips the container without arresting the operation of the agitators, one of the agitators while the container is tilted, tending to feed the material'to the other agitator, which through its reversed. direction of rotation, tends to force the material out through the hopper.

From the above description, it will be apparent that we have produced a ymixing inachine possessing the features of advantage set forthy in the statement of the object of the invention, and which are susceptible of modification in minor particulars without departure from the spirit and scope of the appended claims.

We claim: f

1. A mixing machine, comprising a cylindrical container having an opening at the' top, a. pair of'alined shafts projecting slight- 1y through the end walls of the container axially of the cylindrical body thereof,

means for simultaneously rotating said shafts in opposite directions, and blades carried by the shafts 'and extending longitudinally from a point midway the length-of the body portion to the end walls respecftively and rounded at their peripheral edges to scrape the interior of the body portion,

and provided with inward projections at their outer ends for scraping the inner sides of the end walls, the said blades standing ,at angles to respectively force material in the container, toward the center thereof, and one set of blades being disposed opposite the spaces between the blades of the other set.

' v2. A mixing machine, comprising a cylindrical container having an opening at he top, a pair of alined shafts projecting slig tly through the ends walls of the container axially. of the cylindrical body thereof, means for simultaneously rotating said shafts in opposite directions, arms extending angularly from andrigid with ther shafts, within the container, and blades extending longitudinally of the container from midway the lengt-h thereof to its end walls and fastened at points intermediate their length to the outer ends of said arms, said blades being rounded4 at their peripherel edges to .blades at each end being opposite the spaces scrape the interior face of the body portion between the other end.

l' and provided with inwerd roiections at In witness whereof we hereunto aix our-10 their outer ends for sorapln t e mner faces signatures.'

of said end walls, and said des extending at angles to respectively force material in OLIVER C. TALBOT.

the container toward thecenter thereof, the lANDREW FLOOD. 

